What is the transition directly from a gas to a solid called?

The process of transitioning directly from a gas to a solid is known as deposition. This phenomenon occurs without passing through the liquid phase, which distinguishes it from other related processes. A common example of deposition is the formation of frost, where water vapor in the air freezes directly onto surfaces in cold conditions, creating ice crystals.

Understanding deposition is crucial, particularly in fields like meteorology and physical chemistry, as it relates to climate phenomena and the behavior of matter under various conditions. The clarity of this process reinforces the differences between phase changes, showcasing how matter can transition between states under specific environmental changes.